Exchange 2010 Coexistence with Exchange 2007

Hi there,

I currently have an Exchange 2007 server in NJ. I set up an Exchange 2010 server is LA. What do I have to do for them to operate in coexistence and communicate with each other seamlessly? Thank you.
mizgroupAsked:
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mizgroupConnect With a Mentor Author Commented:
Well i actually had to change my receive connector on my exchange 2007 server to allow Exchange server authentication and to allow permissions for exchange servers under the users.
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mizgroupAuthor Commented:
I have a VPN setup between the sites already.
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AkhaterCommented:
if both are part of the same exchange organization & both are running all the exchane roles they should be already working.

Are you able to exchange emails between btoh? What problems are you running into?
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mizgroupAuthor Commented:
Yes both are part of the same organization and both machines have all the roles. I created a mailbox on the 2010 server and tried to access it via OWA but was unable to. I get this error: Outlook Web Access is currently unavailable. If the problem continues, contact technical support for your organization and tell them the following: No Client Access servers of the appropriate version can be accessed from the Internet. Just so you know I didn't install the client access role right away as i thought I might not have needed it. I installed it after all the roles. Is that a potential problem?
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AkhaterCommented:
plz when you try to go owa use https://2k10IP/owa a d try again does it work? if it does then your solution is easy?
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mizgroupAuthor Commented:
Yes it is working actually.
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AkhaterCommented:
well then u dont have a problem it is just that you should set your CAS 2k10 as your owa address instead of your 2k7.
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mizgroupAuthor Commented:
do i have to do that? what if i wanted to keep my 2k7 server as my owa?
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AkhaterCommented:
well exchane 2K7 cannot redirect to 2K10

2k10 can redirect & proxy to 2k7
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mizgroupAuthor Commented:
Aha i see. what about my incoming mail. can i have mail going to either of the servers and they will route to each other as needed?
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AkhaterCommented:
Yes if both have the cas role installed, as u told me, email routing wont be an issue
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mizgroupAuthor Commented:
For some reason i can send mail externally but not internally
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AkhaterCommented:
U cannot send from 2k10 to 2k7 nor vice versa?

What are the status of your queues ? Where are the email stuck?
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mizgroupAuthor Commented:
sending from 2k7 to 2k10 internally works as well.
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mizgroupAuthor Commented:
I sent from 2010 to an external email address no problem. i also received one no problem. I tried to send an email internally but it is stuck in the hub version 8 queue.
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mizgroupAuthor Commented:
Do i have to change permissions in my receive connectors?
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AkhaterCommented:
No you don't
when you go to the queue where they are stuck what is the last error ? can you share a screenshot ?
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AkhaterCommented:
then it was changed at some point it time :)

everything working fine now ?
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mizgroupAuthor Commented:
Yep working great, thanks for all your help
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mizgroupAuthor Commented:
Problem now, iphones and blackberrys arent working for mailboxes that have been moved to the new server? any suggestions?
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AkhaterCommented:
are these phones using the 2007 cas or the 2010 one ?
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mizgroupAuthor Commented:
They are using the 2007 CAS.
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AkhaterCommented:
then go back to my first post you should hit primary the 2010 one
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mizgroupAuthor Commented:
As for the iphone i set it up to the 2010 server and it worked. as for the blackberry i cant do that as its 4.1 and not compatible with exchange 2010
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AkhaterCommented:
as you just said BB 4.1 is not compatible with exchange 2010

how else can I help you ?
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mizgroupAuthor Commented:
You can use 2007 CAS roles as a proxy in between
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AkhaterCommented:
I didn't get it  sorry is this a confirmation or a question ?
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mizgroupAuthor Commented:
Hahaha that is a fact.
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AkhaterCommented:
ok maybe I don't deal with BB
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AkhaterCommented:
I answered all the OP questions
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mizgroupAuthor Commented:
Ok but i posted the end solution. If i accept yours as a solution people will not come out with the right answer
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AkhaterCommented:
Are you talking about the BB thing ? is this what all the thread was about ?
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mizgroupAuthor Commented:
about the receive connector
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AkhaterCommented:
Ok this is too big to re-read I though you were referring to the BB issue.

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mizgroupAuthor Commented:
oh no not at all, the main point of this is the receive connectors, thanks for all your help again.
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AkhaterCommented:
your welcome!
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